Copper(<scp>ii</scp>) complexes of cyclams with <i>N</i>-(2,2,2-trifluoroethyl)-aminoalkyl pendant arms as potential probes for <sup>19</sup>F magnetic resonance imaging
作者:Zuzana Kotková、Filip Koucký、Jan Kotek、Ivana Císařová、David Parker、Petr Hermann
DOI:10.1039/d2dt03360g
日期:——
A series of Cu(II) complexes with cyclam-based ligands containing two N-(2,2,2-trifluoroethyl)-aminoalkyl pendant arms in 1,8-positions (L1: 1,2-ethylene spacer, L2: 1,3-propylene spacer; L3: 1,4-butylene spacer) was studied in respect to potential use as contrast agents for 19F magnetic resonance imaging (MRI). A number of structures of the complexes as well as of several organic precursors were determined
一系列 Cu( II ) 配合物,具有基于仙客来的配体,在 1,8 位包含两个N -(2,2,2-三氟乙基)-氨基烷基侧臂( L1:1,2-乙烯间隔基,L2:1, 3-丙烯间隔基;L3:1,4-丁烯间隔基)作为19 的造影剂的潜在用途进行了研究F磁共振成像(MRI)。通过单晶 X 射线衍射分析确定了复合物以及几种有机前体的许多结构。确定了每个复合物的几何参数(尤其是氟原子与中心金属离子之间的距离),并确定了溶液中存在的同分异构复合物种类。配体中19 F 核的NMR 纵向弛豫时间 ( T 1 )在临床相关场和温度下 (1–2 s) 在 Cu( II )结合后显着缩短[Cu( L1 )] 2至 7–10 ms + , [Cu( L2 )] 2+为 20–30 ms,[Cu( L3)为 20–50 ms)] 2+。弛豫时间缩短的趋势与氟原子与Cu( II )离子之间的化学键距离和数量有关。信号显示有希望的T